Lightning problem at night

Hello,
I am trying to make an atmosphere in UE4, and since I am quite new, I am experiencing some problems.
I have set my world Light Source to it looks like night, but whenever I do this, my meshes seem to emit light :
http://puu.sh/n5Sa2/8c19d5a33c.png
Is there a way to make it dark at night ?

Also the first-person model is all white at night, like on this picture : http://puu.sh/n5Sof/b3bdfe3718.png
How do I fix this please ?

I apologize if my english is bad, I didn’t sleep a lot last night.

Thanks in advance !

It looks like the issue you are having is the light shining up from the bottom of the map. I have a day/night cycle that sets the sunlight intensity to “0” when it is under the horizon and it got rid of this issue. My night map has the sun pitch set to 90 and the yaw set to -200.

You will also see that the night sky horizon seems a little bright on default settings and you can get rid of that by searching for the sky sphere in the world outliner and open C_Sky_Horizon_Color. On the far left you will see the last color that is shown at night, select this and set it to all black (0,0,0) and then your sky will be dark.

How did you set the sun intensity to 0?